Go代码基于dockerfile做成镜像

一、在服务器上先将程序编译完成

基础环境安装与初始化

https://mirror.go-repo.io/centos/7/x86_64/

# 手动执行步骤
yum install go -y

# 将go代码拷贝进入机器
# 初始化go项目
[root@moban test]# pwd
/root/test
# 下载模块
[root@moban test]# go mod init test
go: creating new go.mod: module test
go: to add module requirements and sums:
    go mod tidy

[root@moban test]# cat main.go 
package main 
 
import ( 
     "net/http" 
 
     "github.com/gin-gonic/gin" 
) 
 
func statusOKHandler(c *gin.Context) { 
     c.JSON(http.StatusOK, gin.H{"status": "success~welcome to study"}) 
} 
 
func versionHandler(c *gin.Context) { 
     c.JSON(http.StatusOK, gin.H{"version": "v1.1 版本"}) 
} 
 
func main() { 
     router := gin.New() 
     router.Use(gin.Recovery()) 
     router.GET("/", statusOKHandler) 
     router.GET("/version", versionHandler) 
     router.Run(":8080") 
} 

# 由于go访问都是国外网址，需要设置代理
[root@moban test]# go env -w GOPROXY=https://goproxy.cn,direct
[root@moban test]# go mod tidy
go: finding module for package github.com/gin-gonic/gin
go: downloading github.com/gin-gonic/gin v1.8.2
....

# 构建源码
[root@moban test]# CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o k8s-demo main.go

[root@moban test]# ll
总用量 9912
-rw-r--r-- 1 root root      987 2月  15 10:23 go.mod
-rw-r--r-- 1 root root     8620 2月  15 10:23 go.sum
-rwxr-xr-x 1 root root 10129011 2月  15 10:24 k8s-demo
-rw-r--r-- 1 root root      466 2月  15 10:18 main.go

手动环境变量设置

export GO111MODULE="on"
export GOPROXY="https://goproxy.cn,https://gocenter.io,direct"
export GOPRIVATE="github.com/gstones/*"
export GOPATH="/db/gowork"

阿里云go module代理

1.使用go1.11以上版本并开启go module机制

2.导出GOPROXY环境变量

export GOPROXY=https://mirrors.aliyun.com/goproxy/

二、编写dockerfile文件

[root@moban test]# cat dockerfile 
FROM alpine 
WORKDIR /data/app 
ADD k8s-demo /data/app/ 
CMD ["/bin/sh","-c","./k8s-demo"] 

[root@moban test]# docker build -t "go-test" .
Sending build context to Docker daemon  10.14MB
Step 1/4 : FROM alpine
latest: Pulling from library/alpine
63b65145d645: Pull complete 
Digest: sha256:69665d02cb32192e52e07644d76bc6f25abeb5410edc1c7a81a10ba3f0efb90a
Status: Downloaded newer image for alpine:latest
 ---> b2aa39c304c2
Step 2/4 : WORKDIR /data/app
 ---> Running in 2fe4717922e2
Removing intermediate container 2fe4717922e2
 ---> fa1f50d47552
Step 3/4 : ADD k8s-demo /data/app/
 ---> 132cba444301
Step 4/4 : CMD ["/bin/sh","-c","./k8s-demo"]
 ---> Running in 0852c02add23
Removing intermediate container 0852c02add23
 ---> 892024d4c9d4
Successfully built 892024d4c9d4
Successfully tagged go-test:latest

[root@moban test]# docker run -di --name go -p 30180:8080 go-test:latest
a4cddbaad8a38cdd536965ec24d17351424a808eed6754ca147158b923644334
[root@moban test]# docker ps
CONTAINER ID   IMAGE            COMMAND                  CREATED          STATUS          PORTS                                         NAMES
a4cddbaad8a3   go-test:latest   "/bin/sh -c ./k8s-de…"   25 seconds ago   Up 24 seconds   0.0.0.0:30180->8080/tcp, :::30180->8080/tcp   go

http://192.168.10.30:30180/
{"status":"success~welcome to study"}
http://192.168.10.30:30180/version
{"version":"v1.1 版本"}

 二、在docker里面进行编译

用好scratch，打包最小镜像

FROM golang:1.18 AS builder
 
ENV GO111MODULE=on \
        CGO_ENABLED=0 \
        GOOS=linux \
        GOARCH=amd64
ENV GOPROXY=https://goproxy.cn
 
WORKDIR /build
COPY go.mod ./
COPY go.sum ./
RUN go mod download
COPY hello.go ./
RUN go build -o hello .
 
FROM scratch
COPY --from=builder /build/hello /
ENTRYPOINT ["./hello"]


引用：https://blog.csdn.net/xingyunyang/article/details/125547683